From: Yukihiro Matsumoto <matz@...>
Date: 2008-09-07T22:06:04+09:00
Subject: Re: #to_self

Hi,

Have you tried?  It won't work.

							matz.

In message "Re: #to_self"
    on Sun, 7 Sep 2008 21:48:30 +0900, Trans <transfire@gmail.com> writes:
|
|Say I have a mixin:
|
|  module Grumpy
|    def grumpize
|      to_s.upcase + '!!!!!!!!!'
|    end
|  end
|
|  class String
|    include Grumpy
|  end
|
|  "fun".grumpize  #=> "FUN!!!!!!!!!"
|
|Now,
|
|  class Symbol
|    include Grumpy
|  end
|
|  :fun.grumpize  #=> "FUN!!!!!!!!!"
|
|But, hey, I want a Grumpy Symbol here, not a String!
|
|I don't want to have to make a mixin exception for Symbol. So what's a
|general solution?
|
|My considerations of this led to:
|
|  class String
|    alias_method :to_self, :to_s
|  end
|
|  class Symbol
|    alias_method :to_self, :to_sym
|  end
|
|  module Grumpy
|    def grumpize
|      (to_s.upcase + '!!!!!!!!!').to_self
|    end
|  end
|
|That does the trick. And more besides, #to_self seems interesting in
|and of itself.  Would #to_self be generally useful throughout Ruby's
|Object models? What else could be done with it, I wonder?
|
|T.